prevent vs steam up

prevent

verb
  • To stop (an outcome); to keep from (doing something). 

steam up

verb
  • To become steamy. 

  • To become coated with condensation. To fog up. 

  • To bring (a steam boiler) up to working steam pressure. 

How often have the words prevent and steam up occurred in a corpus of books? (source: Google Ngram Viewer )